Valve-chest



(No Model.)

P. W. JENKINS VALVE GHEST.

No. 539,742. Patented May 21, 1895.

UNTTED STATES PATENT I FFECE.

FRANK IV. JENKINS, OF BROOKLYN, NEW YORK, ASSIGNOR TO HENRY R.

' WORTHINGTON, OF ELIZABETH, NEW JERSEY.

VALVE-CHEST.

srEoIFIcA'rIoN forming part of Letters Patent Nasse /42, dated May 21,1895. Application filed June 26,1894. $erialNo. 515,719. (Nomodeh) Towhom it may concern:

Be it known that I, FRANK W. JENKINS, a citizen of the United States,residing at Brooklyn, county of Kings, and State of New York, haveinvented certain new and useful Improvements in Valve-Chests, fullydescribed and represented in the following specification and theaccompanying drawings, forming a part of the same.

The object of the present invention is to provide an improved valvechest construction adapted especially for use on steam cylinders, theespecial object being to make the valve rod and valve more accessiblefor removal or inspection than in constructions heretofore in use. Isecure this result by dividing the 'valve chest centrally of the valverod, so that the bearing for the valve rod is partly in the cover andpartly in the body of the valve chest. By removing the cover, therefore,the valve rod is free to be lifted from its bearings in the body of thevalve chest. By this construction I not only make the valve rod andvalve more accessible, but secure other advantages which will be pointedout hereinafter.

For afull understanding of the invention, a detailed description willnow be given of a construction embodying the same in its preferred formas applied to a steam cylinder of common construction'with a slide Valveand sliding valve rod, certain features of which construction form inthemselves part of the invention, in connection with the accompanyingdrawings, forming a part of this specifica-' tion, and the featuresforming theinvention will then be specifically pointed out in theclaims.

In the drawings, Figure 1 is a side elevation of the upper portion of asteam-cylinder and a steam-chest embodying the invention. Fig. 2 is acentral vertical section of the same. Fig. 3 is a horizontal sectiontaken between the cover and body of the steam-chest.

Referring to said drawings, A is the steam cylinder, B the piston, a, b,the induction and exhaust ports, 0, the main valve which is shown of thecommon D form, and D, E, the induction and exhaust pipes, all theseparts being of the usual or any suitable construction.

The valve D is provided with the usual cars 10 engaged at opposite sidesby collars 11 on vertically. The valve chest, as shown, is divided on athe Valve rod F for actuating the valve, this valve rod being shown asjointedoutside the valve chest 'to a connecting rod G by which the valverod is actuated from the'valve motion of the engine, as usual, thisjoint being such as to permit the valve rod to be swung plane extendinglongitudinally and centrally of'the valve rod at the latter. the upperpart forming a removable cover H. It will be under'stood that the valvechest need not be divided 011 a single plane as shown, but that it isnecessary only that the plane of division at plane of division at otherpoints being difter- I ent if desired.

The body of the valve chest is shown as cast integral with the cylinderand the cover as formed of a single casting and secured theretoby bolts12 passing through the cover and entering the body of the valve chest.It will be understood,however, that the cover and body of the valvechest may be formed andsecured together in any other suitable manner. Bythis construction the bearings for the valve rod are divided between thecoverand body.

The induction pipe D preferably connects with the body of the valvechest, as shown, so that the cover may be removed without interferingwith the pipe.

The valve rod is shown as packed where it.

passes through the outside of the valve chest by a packing 2 of theusual form which lifts out and is restored to place by lifting orlowering the valve rod and secured in the stuffing box 13 projectingfrom the valve chest by a screw follower 14. Any other suitable methodof packing and follower may be substituted for this construction.

It will be seen that when it is desired to inspect or remove the Valve,it is necessary only to remove the bolts 12 and take off the cover H,the follower 13 being previously backed off, when the valve rod may beswung upward on its joint with the connecting rod G so as to remove itentirely from the valve and leave the latter free to be lifted out. If aconstruction be used in which the valve is connected to the rod, thevalve will then be swung out of the valve chest with the rod. The partsmay be restored to position 'by swinging the valve rod F down intoplace, replacing and securing the cover, and screwing up the follower13. Thus, it will be seen that in the preferred construction shown thereare no more joints to make than in the old style chests with fiatcovers, and by breaking a single joint the valve rod can be lifted out.The simplicity of the operation as compared with the operation ofremoving the valve in present constructions is obvious. In addition tothe advantages secured by the increased accessibility of the valve, thevalve rod may be cheaper and more substantial in construction. It ispossible, also, to form the collars 11 integral with the valve rod orpermanently secure them thereto in any suitable manner, as shown in thedrawings, instead of using screw collars, as at present. This preferredconstruction forms a part of the invention, and will be found verydesirable, as it prevents any tampering with the adjustment of thevalve, so that it is certain that the latter will remain exactly asarranged by the manufacturer.

It will be understood that the invention broadly considered is not to belimited to a sliding valve and rod but is applicable also in connectionwith valves and rods having other movements; also that the invention maybe applied in connection with cylinder and valve chest constructions ofother general form, and that many modifications may be made in theconstruction shown without departing from the invention.

What is claimed is-- 1. The combination with a cylinder, valve and valverod, of a valve chest formed of a body and cover, the line of divisionbetween the body and cover being central of the valve rod, and astuffing box for the valve rod also divided centrally of the valve rod,substan tially as described.

2. The combination with a cylinder, valve and valve rod, of a valvechest formed of a body and cover, the line of division between the bodyand cover being central of the valve rod, and a valve rod connectionoutside the valve chest permitting the rod to be lifted out of its seatwhen the cover is removed, substantially as described.

3. The combination with a cylinder, valve and valve rod, of a valvechest formed of a body and cover, the line of division between the bodyand cover being central of the valve rod, a stuffing box for the valverod also divided centrally of the valve rod, and a valve rod connectionoutside the valve chest permitting the rod to be lifted out of its seatwhen the cover is removed, substantially as described.

t. The combination with a cylinder, slide valve and sliding valve rod,of a valve chest formed of a body and cover, the line of divisionbetween the body and cover being central of the valve rod, and astuffing box for the valve rod also divided centrally of the valve rod,substantially as described.

5. The combination with a cylinder, slide valve, and valve rod providedwith non-adjustable collars for actuating the valve, of a a valve chestformed of a body and cover, the line of division between the body andcover being central of the valve rod, substantially as described.

In testimony whereof I have hereunto set my hand in the presence of twosubscribing witnesses.

FRANK W. JENKINS.

Witnesses:

ARTHUR L. KENT, C. J. SAWYER.

